Unity2020.1 Android插件制作

之前写插件的时候搜索了大量资料，有些因为版本问题过时，有些根本就是错的，所以记录下亲测的步骤

• 修改 unity设置

  1. 文件→生成配置→Android→导出项目

     

  2. 基于 1 的页面，点击左下角「玩家设置」→其他设置→配置→脚本后端→IL2CPP，目标架构→ARMv7, ARM64

  

  3. unity 偏好设置→外部工具，确保配置好 sdk 和 ndk

     

• 插件开发(可参考部分)

  1. 新建Android studio 项目

     1. Empty Activity
     2. 包名随意
     3. minimum SDK 跟 unity 项目保持一致

  2. 拷贝unity 的 classes.jar (/Applications/Unity/PlaybackEngines/AndroidPlayer/Variations/mono/Release/Classes\classes.jar) 到 项目 app/libs 目录下，右键 classes.jar→Add As Library

  3. MainActivity 删除 setContentView 行代码, 删除 layout 下 activity_main.xml

     

  4. 修改 build.gradle apply plugin: 'com.android.application 改成 apply plugin: 'com.android.library, 删除 defaultConfig 下的 applicaionId 行

     

  5. 在 /Applications/Unity/Hub/Editor/2020.1.13f1/PlaybackEngines/AndroidPlayer/Source/com/unity3d/player/UnityPlayerActivity.java 找到 UnityPlayerActivity.java, 直接拷贝source 目录下的 com 包到 java文件夹

  6. 修改 AndroidManifest.xml

  7. 在 build.gradle 里加入依赖库，比如:

     

  8. 新建一个 class，在里面写原生代码:

     package 路径;
     public class MyClass {
         private Class unityPlayerClass;
         private Field unityCurrentActivity;
         private Method unitySendMessage;
     
         public void init () {
     
             //Get the UnityPlayer class using Reflection
             unityPlayerClass = Class.forName("com.unity3d.player.UnityPlayer");
             //Get the currentActivity field
             unityCurrentActivity= unityPlayerClass.getField("currentActivity");
             //Get the UnitySendMessage method
             unitySendMessage = unityPlayerClass.getMethod("UnitySendMessage", new Class [] { String.class, String.class, String.class } );
         }
     
         //Use this method to get UnityPlayer.currentActivity
         public Activity currentActivity () {
     
             Activity activity = (Activity) unityCurrentActivity.get(unityPlayerClass);
             return activity;            
         }
     
         public void unitySendMessageInvoke (String gameObject, String methodName, String param) {
             //Invoke the UnitySendMessage Method
             unitySendMessage.invoke(null, new Object[] { gameObject, methodName, param} );
         }
     
         public void makeToast (final String toastText, final int duration) {
             currentActivity().runOnUiThread(new Runnable() {
                 @Override
                 public void run() {
                     Toast.makeText(getActivity(), toastText, duration).show();
                 }
             });
         }
             // 别忘了调用
             private void listenSDKData() {
                 currentActivity().runOnUiThread(new Runnable() {
                     @Override
                     public void run() {
                         MotrixiSDK.INSTANCE.setOnLogListener(new OnLogListener() {
                             @Override
                             public void onLogListener(String s) {
                                 unitySendMessageInvoke("UnityAndroidConnect", "AndroidCallUnityMsg", s);
                             }
                         });
                     }
                 });
             }
     }

  9. Build->Make Project，一般只要 build/intermediates/arr_main_jar/debug/classes.jar 就行
     

  用压缩包打开jar 包，删除 com 目录下的 unity3D和 项目名最底层文件夹里的 BuildConfig.class

  

  10. 把上述项目的 AndroidManifest.xml 和 导出的 classes.jar(可以改名)放到unity 中，路径如下

      jar 放到 Assets/Plugins/Android/libs 下

  11. 在/Applications/Unity/Hub/Editor/2020.1.13f1/PlaybackEngines/AndroidPlayer/Tools/GradleTemplates 路径下有 gradle 模板，把需要用到的放到 unity 项目 Assets/Plugins/Android 下:

      • BaseProjectTemplate.gradle: project 路径下的gradle
      • gradleTemplate: gradle 配置
      • mainTemplate: module 下的 gradle

  12. Unity 创建一个GameObject，命名与自定义java class 文件中的 gameObject 名字一致, Assets 下创建一个cs文件，关联到GameObject.

      cs 文件如下：

      using System;
      using System.Collections;
      using System.Collections.Generic;
      using UnityEngine;
      using UnityEngine.UI;
      
      public class UnityAndroidConnect : MonoBehaviour
      {
      
          private string appKey = "";
              // 两个按钮
          private GameObject resetButton;
          private GameObject uploadButton;
              // 文本框
          private GameObject informationLabel;
              // 文本框的文字
          public Text informtaionText;
      
          // AndroidJavaClass jc;
          AndroidJavaObject androidInstance; 
      
          // Start is called before the first frame update
          void Start()
          {
              try
              {
                              //参数就是jar 包的项目package name
                  androidInstance = new AndroidJavaObject("com.motrixi.unity.plugin.Motrixi");
                  if (null != androidInstance) 
                  {
                                      // 参数为自定义 java 文件里的方法
                      androidInstance.Call("initPlugin");
                                      androidInstance.Call("init", appKey)
                  }
              }
              catch (Exception e)
              {
                  Debug.Log( "init error:" + e.ToString());
              }
                      // 获取 resetButton
              resetButton = GameObject.Find("ResetButton");
              resetButton.GetComponent().onClick.AddListener(Reset);
      
              uploadButton = GameObject.Find("UploadButton");
              uploadButton.GetComponent().onClick.AddListener(DebugUpload);
      
              informationLabel = GameObject.Find("SdkInformationArea");
      
              informtaionText = GameObject.Find("SdkInformationArea").GetComponent();
          }
      
           public void Reset()
           {
              try
                  {
                      Debug.Log("Reset Clicked. ClickHandler.");
                      androidInstance.Call("resetConsentForm");
                  }
              catch (Exception e)
                  {
                      Debug.Log( "reset button error:" + e.ToString());
                  }
           }
      
           public void DebugUpload()
           {
                  try
                  {
                      Debug.Log("DebugUpload Clicked. ClickHandler.");
                      androidInstance.Call("upload");
                  }
              catch (Exception e)
                  {
                      Debug.Log( "DebugUpload button error:" + e.ToString());
                  }
           }
      
              // java 传给 unity 的方法
           public void AndroidCallUnityMsg(string recvMsg)
           {
              Debug.Log("recvMsg:" + recvMsg);
              informtaionText.text = recvMsg;
           }
      
          // Update is called once per frame
          void Update()
          {
      
          }
      }

  13. 导出Android项目就可以了